granger



(No Model.)

J. W. GRANGER. PIANO DAMPER.

No. 446,097. Patented Feb. 10,1891.

WITNESSES INVENTUR UNITED STATES PATENT OFFICE.

JOHN V. GRANGER, OF NEW YORK, X. Y.

PIANO-DAM PER.

SPECIFICATION forming part of Letters Patent No. 446,097, dated February 10, 1891.

Application filed September 5 1890. Serial No. 364,026. (No model.)

To all whom it may concern.-

Be it known that I, JOHN V. GRANGER, of New York city, New York, have invented an Improved Damper for Pianos, of which the following is a specification.

This invention relates to an improved pitl10-(lall3] )G1,t11(l more particularly to the construction of parts for connecting the damperbloek to the stud or post.

The invention consists in the various features of improvement, more fully pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of my improved damper. Fig. 2 is a side view of the post with its jaws parallel and embracing the damper-wire. Fig. 3 is a similar view of the post with its jaws spread.

The letter 0. represents the block of a piano-damper, to which is glued the felted head a at one end, and which is provided at its other end with a mortise for the reception of the stud c. The block a may he made in two pieces, as shownfor in one piece. This stud is slotted or divided at one end to form two shanks c, that are provided with a series of parallel surface grooves or corrugations e \Vhere the shanks c join the solid part of the stud c, the slot widens to form acommunicating-perforation c" for the reception of the damper-wire (Z. Through the solid part of the stud there passes a set-screw 6, adapted to bear upon such wire.

In attaching the stud c to the block a the shanks o are in their parallel position, Fig. 2, introduced into the socket of the block.

Next the set-screw e is turned to bear upon the wire (Z. The wire being thus forced outward will spread the shanks c apart at their free ends, Fig. 3, and thus firmly secure the stud to the block.

\Vhen it is atany time desired to change the inclination of the damper-head, it is only necessary to first turn the set-screw back, so as to release its pressure upon wire (Z, when the damper may be freely revolved.

The object of the grooves c' is to prevent any possibility of slipping. By forming a series of grooves the jaws may be inserted into the block to different depths, and thus the distance between the damper and the string may be readily adjusted.

What I claim is- 1. A piano-damper having a mortised block a and a divided stud c engaging such block, substantially as specified.

2. The combination of head a and mortised block a with divided stud o, ei'ieaging said block, and with a set-screw 0 within the stud, substantially as specified.

3. The combination of head a and mortised block a with divided stud 6, having perforation 0 and with set-screw e, substantially as specified.

4-. The combination of head a and niortised block a with divided stud 0, having a pair of corrugated shanks o and perforation c", and with set-screw e, substantially as specified.

JOHN T. GRANGER.

Witnesses:

F. v. BRIESEN, A. JONGHMANS. 

